“…An extensive empirical knowledge base suggests that school leadership, often somewhat narrowly focused on school principals, can influence those in-school conditions that enable improvement in teaching (Leithwood & Montgomery, 1982;Bossert, Dwyer, Rowan, & Lee, 1982;Hallinger & Murphy, 1985;Louis, Marks, & Kruse, 1996;Rosenholtz, 1989) and indirectly affect student achievement (Hallinger & Heck, 1996;Leithwood, Louis, Anderson & Wahlstrom, 2004). Perhaps responding to this evidence, philanthropic and government agencies have invested more energy and resources on developing school leadership, typically though not always focused on school principal preparation and professional development programs.…”